All the peices except for the cloak drop in the anti-virtue dungons. The cloak is a quest that you have to do that kinda a pain in the butt, its not bad it just takes along time to do. All the other peices in my opinion are the bigger pain because you have to farm the dungons for the drops, and with all the other arties that drop you could be there a while.
I've need 2 peices to compleat my suit for about 3 months and can't seem to get them.URRRRG oh well I'll keep at it. Good Luck hehe